Abstract
Optical coherence tomography (OCT) is being developed to guide
various ophthalmic surgical procedures. However, the high cost of the
intraoperative OCT system limits its availability mostly to the largest
hospitals and healthcare systems. In this paper, we present a design and
evaluation of a low-cost intraoperative common-path free-hand scanning OCT
system. The lensed fiber imaging probe is designed and fabricated for
intraocular use and the free-hand scanning algorithm that could operate at
a low scanning speed was developed. Since the system operates at low
frequencies, the cost of the overall system is significantly lower than
other commercial intraoperative OCT systems. The assembled system is
characterized and shows that it meets the design specifications. The
handheld OCT imaging probe is tested on multilayer tape phantom and
ex-vivo porcine eyes. The results show that the system could be used as an
intraoperative intraocular OCT imaging device.
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